Question

Which of the following lists of ordered pairs is a function?

Answer 1

B. x can only have one answer

Answer 2

Answer: B. (2,5) , (3,6) , (6,9)

Explanation:

• A relation is said to be a function if each input corresponds to a unique output.
• If an input corresponds to more than one output then , the relation is a not a function.

In ordered pair , the x coordinate shows the input value and the y-coordinate shows the output value.

In the given lists only list B is representing a function since each input corresponds to a unique output.

In list A. , 2 corresponds to two different values i.e. 5 and 1 .

Thus its not a function.

In list C., 2 corresponds to two different values i.e. 5 and 3 .

Thus its not a function.

In list D. 4 corresponds to two different values i.e. 0 and 3 .

Thus its not a function.